Burglar alarm



March 9 192s. 1,576,334

F. J. KOKAL BURGLAR ALARM Filed Se?, 1'7l924 3 Sheets-Sheet 1 ZP 3a' March 9 1926. 1,5765334 F. J. KOKAL BURGLAR ALARM Filed Oct. 17, 15324 I5 Sheets-Sheet 2 @y 1 l @mi d l J4: @@Q@ @30 /k 96 30. 29 .az

fwazffa/wz Vv/ITNESS: ATTORNEY March 9 1926.

'F. J. KQKAL BURGLAR ALARM Filed oct. 17. 1924 3 Sheetysheet 5 Patented Mar. 9, 1926.

Uni-ran *STATES isaiasi` PATENT orifice.

BURGLAR ALARM.

i Application filed October 17, 1924. Serial No. 744,234.

To all whom it may concern:

VBe it known thatI I, FRANK J. Konan, a citizen of the United States, residing at l-lerminie, in the county of l/Vestinoreland and State of Pennsylvania, have invented new and useful Improvements in Burglar Alarms, of which the following is a specification. Y

This invention relates to burglar alarms especially designed for doors, windows and the like and has for an object the provision of an alarm which will be actuated by the opening of a door or window for the purpose of notifying persons in the vicinity of the unauthorized opening of such door or window, the device being useful in residences, outhouses and other buildings.

I Another object of the invention is the provision of a burglar alarm which when actuated willdiscliarge a plurality of cartridges, means being provided whereby the cartridges will be fired at intervals so as to `more definitely sound the alarm and frightw en an intruder.

Another object of the invention is the provision of a. burglar alarm of the above type which includes a trigger shaft capable of` i lateral movement out of the path of the triggers so that the trigger actuating means may be intentionallyr operated without discharging the cartridges.

`With the above and other objects in view, the invention further includes the following novel features and details of construction, to be hereinafter more fully described, illustrated in the accompanying drawings and pointed out in the appended claim.

Figure 1 is an elevation showing a portion of a door with the invention applied.

Figure 1a is a similar view showing the device differently arranged.

Figure 2 is a sectional view taken longitudinally through the alarm.

Figure 3 is a section on the line 3-3 of Figure 2.

Figure 4 is a similar view on the line 4-4 of Figure 2.

Figure 5 is a section on the line 5-5 of Figure 2.

Figure 6 is a section on the line 6 6 of Figure 2.

Figure 7 is a detail perspective view of one member of the cartridge holder. p

Figure 8 is a similar view of the other member of said holder.

to be actuated as the door .is opend, as will be later apparent.

The alarm includes a casing 13 which `1s provided with a removable lid or cover 14, whereby access may be had tothe interior of the casing. In motiliting the casing the lid or cover 14 is provided at opposite endswith brackets 15', from one end of which extend ears 16 having open ings for the passage of screws or other fastening devices. From the outer ends of the brackets 15 extend spring tongues 17 whose extremities are provided with offset portions or shoulders 18 adapted for removable engagement with lugs 19 secured to the casing 13. The casing may thus be inserted within the cover 14 and held in place by the tongue 17. vided with a gauze or wire covered sight opening 20. l

Located within the casing 13 is` a block 21 which is provided with a plurality of spaced slots 22, while pivotally mountedl beneath this blockupon a shaft 23 is a plurality of hammers 24. These hammers move within the slots 22; and are providedV with firing pins or points 25.

Mounted upon the block 21 is a cartridgev holder which includes a transversely L- shaped member 26. This member is removably held in place by means of screws or other fastening devices 27 which extend. through openings 28 provided in the inember 26 and engage the block 21. The member 26 is further provided with spaced cartridge receiving openings 29` which are adapted to hold blank cartridges 30. The member `26 may thus be removed and the cartridges inserted within the opening 29 and the said member thereafter replaced. The cartridge holder further includes a pla-te 31 which is provided with spaced Vopenings 32 adapted to register with the openings 29. This plate engages the end of the cartridge shell and acts to hold the car- The casing is further pro- CIK tridge in place, While the openings 32 provide for the passage of the iiringpins or points 25. rlhe plate 31 is secured to the block 21v by means of screws or other fastening devices 33 which vpass Ythrough apertured ears carried by the plate 31.

The blockQl is further provided with a plurality of openings 34 which communicate With the slots 22 and Within vwhich are mounted balls or spheres These balls or spheres 35 are forced against the hammers 24 by means of springs 36 so that when the said hammers are moved to the right 4of Figure 2 of the drawings and released', the springs 36 Will act to snap thehammers back against the end of the cartridges so as to fire the latter While the balls or spheres 35 act to reduce friction.

Mounted transversely ofthe casing'f13 and extending through the flange of the lid or.

This shaft hasA cover 14; is a roel; shaft 37. secured upon its outer end a crank arm 38 which, when thel alarm is secured in place will be arranged in the path of: opening of the door 1() so as to' rock the shaft. 'The shaft 37 carries a plurality of radially eri-- These Tlingers or triggers are spaced longitudinally along the shaft 38 and are also *circumfei entially offset or spaced andare located so that When the shaft 37 is rocked thej,7 Will engage and-,moveV the hammersas previously explained sok that the said' hammers may snap haelt upon the cartridges. ting` the triggers 39, the hammers will be fired consecutively or at intervals.

Mounted upon the shaft 38 are springs a0 which are positioned between the outertriggers 39 and the inner Walls of the casing' 13,

washers 41 being interposed between the Walls and the adjacent ends'of the springs. r1`he shaft 38 Will thus be frictionally and yieldingly held against movement and at By offsety the same time may be manually moved longitudinally so as to permit of its rotation Withoutengaging the hammers.

In order to set the alarm from the outside of a. door as in the case Where the alarm is usedupen a hen house, there is provided an angle plate 4t2 having a slot Li3 therein. This platev is secured to the door frame in such position that one of the ears 1G will enter the slot 43, while the casing is capable of pivotal movement upon the screw which passes through the other ear.l By attach ing astring to the free ear 16 and passing the same through an opening upon the outside of the building, the door may' be closed and the device lowered so that the free ear 15 Will enter the slot 4:3 and the device Will be held in place for use.

The invention is susceptible of various changes in its forni, proportions and minor details of construction and the rightis herein reserved to make such changes as properly fall `Within the scope of the appended claim. l i

Having described the invention what is claimed is An alarm including' a casing, a block in said casing,` having spaced slots and openings communicating with said'slots, a car- 'FRANK J. KOKAL.` 

